Error Occurs During The Down Movement Of The Id Unit; Fuser Unit Error (Error 170 To 177); Error Occurs Immediately After The Power Is Turned On - Oki MC561 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(10-1-3) Sensor check
Up/Down sensor Check if shape and movement of the sensor
lever (unified levers have any abnormality or not.
structure with the
left link lever)
Up/Down sensor Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function of
the self-diagnostic mode.
Check if the SCAN state changes or not when
the incoming light is interrupted/passed by using
a piece of paper or the like for the transparent
type sensor.

(10-2) Error occurs during the Down movement of the ID unit

Check item
(10-2-1) Check the mechanical load during the Down movement
Mechanical load Check if abnormal heavy load is applied when
during installation removing the ID unit.
and removal of the
ID unit
Greasing to the Check if the slant surface of the link lever is
right and left Up/ coated by grease or not.
Down link levers
Assembled Check if any part exists or not in the vicinity of
condition of the link lever, that hampers movement of the link
right and left Up/ lever.
Down link levers
44473001TH Rev.1
Check operation Actions for NG
results
Replace the left
link lever.
Replace the
high voltage
board.
Check operation Actions for NG
results
Replace the ID
unit, or replace
the right/left
side plate.
Apply grease.
Assemble them
correctly.

7.5.4. (11) Fuser unit error (error 170 to 177)

(11-1) Error occurs immediately after the power is turned on.

Check item
(11-1-1) Thermistor is defective Note)
Upper thermistor, Check the respective thermistors if they are
lower thermistor, shorted or opened internally.
frame thermistor Check the resistance value at the connector pins
in the bottom of the fuser unit.
(Refer to section 8.1 Resistance check (fuser
unit).)
Installed condition Check if the fuser nit is pressed in until the
of fuser unit. connector in the bottom of the fuser unit is surely
connected.
Note! Service calls 171 error and 171 error can occur when the printer temperature
is below 0 . Turn on the power again after the printer temperature has
increased.
7. TROUBLESHOOTING PROCEDURES
Check operation Actions for NG
results
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Re-set the fuser
unit.
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